| A | B |
|---|
| Drainage Basin | The area of land in which water drains into a stream system. |
| Divide | A ridge from which water drains to one side or the other. |
| Floodplain | An area of land on either side of a stream that is underwater when the stream floods. |
| Delta | An area of land fromed by the buildup of sediment at the end, or mouth of a river. |
| Sinkhole | A basin that forms when the roof of a cave becomes so thin that it suddenly falls in because water that supported the roof has drained away. |
| Longshore Drift | The zizag movement of sand along a beach. |
| Dune | A mound of sand built up by wind. |
| Glacier | A large mass of ice that moves over land. |
| Moraine | A deposit of till left behind by a retreating glacier. |
| Unicellular | A term used to describe an organism made up of a single cell. |
| Deposition | The part of the erosion process in which sediment is placed in a new location or deposited. |
